NULL pointer dereference in Python

CVE-2019-5010

An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

EPSS: 0.214 (97.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-5010?
CVE-2019-5010 is a high-severity vulnerability in Python, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-10-31.
How severe is CVE-2019-5010?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-5010 known to be exploited?
6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.